Manage Cameras outside the HA Network

[lebretr]

This pull request adds support for accessing Hikvision cameras outside of the Home Assistant network.

Use Case example: Home Assistant is in a house and cameras are in another house. So, HA accesses the cameras with an external address https://mysecondhoud.domain and the cameras send alert messages to HA with the address https://ha.myfirsthouse.domain

For this, on the router of the second house, we have to configure NAT like that:	Device	Inner port	Outside port	Info
CAM 1	554	5001	RTSP
CAM 1	443	4001	HTTPS
CAM 2	554	5002	RTSP
CAM 2	443	4002	HTTPS

To manage this use case, the key changes are:

• Allow user to force RTSP port to access camera
• Fix server alarm address management to allow user to set an url with hostname (and not only ip)
• Fix "Device search" in sensor management to find the good device by macAddress (because hostname/ip are the same for all the cameras)

Other changes:

• Add pytest management on windows pc with Vscode and docker (See problem and solution here )
• Small rework of init_integration in conftest to permit to load several device in one unit test

Note: I'm not a python developper so maybe there is better way to test on windows et manage loading several device in one unit test

[maciej-or]

thanks for the contribution, I will help improve the tests